Flight Design

Flight Design

In science class we a making 2 liter bottle rockets, any suggestions on the design for the best flight?

we have to make fly atleast 6ft i wanna try to get mine to go atleast 5 times that

With a 2ltr - use at least 1/3 of water in there to begin with - you should be able to get to 60 feet +

Use a band cut from another bottle about 3" wide, and use 3 thin wood canes to attatch this band a good 8" behind the main bottle. This ring is the best "tail-fin" design.

Go to a tyre depot - and ask for a tyre valve - complete. Remove the inner core.
You should be able to rig this to the top of a solid pipe for launching - using a tyre pump on the valve. Use a length of solid pipe just pushed inside the rubber valve top. Make a hole in the cap of your rocket to fit this pipe EXACTLY.

The next bit is crucial - the release mechanism. The best method seems to be a number of nylon zip-ties arranged pointing inwards, and holding onto the neck of the bottle. A pipe-ring then slips over this, and this acts like a collet. The free ends of the zip-ties are then clamped securely to the launch pipe with a jubilee clip.

The bottle (with water) is slipped over the stiff pipe, and slid down to the rubber valve - providing a seal. The zipties go over the neck - and the small pipe ring holds them there.

Attatch string to the release ring, and feed through a ring at the base of the launch base. Pump- up - then pull string.

4 Bar is fine - that's 60 PSI. Bottles can burst at 100PSI - or if damaged - so wear goggles.

Google bottle rocket for pictures.

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Flight Design




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